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log4j web.xml配置

a. web.xml

add following code to web.xml

<servlet-name>log4j-init</servlet-name>

<servlet-class>com.legendinfo.log.Log4jInit</servlet-class>

<init-param>

<param-name>log4j-init-file</param-name>

<param-value>WEB-INF/classes/log4j.property</param-value>

</init-param>

<load-on-startup>1</load-on-startup>

</servlet>

b.create a special servlet for log4j initialazation

save the file in the web-info/classes folder

package com.legendinfo.log;

import org.apache.log4j.PropertyConfigurator;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.io.PrintWriter;

import java.io.IOException;

public class Log4jInit extends HttpServlet {

public void init() {

String prefix = getServletContext().getRealPath("/");

String file = getInitParameter("log4j-init-file");

// if the log4j-init-file is not set, then no point in trying

if(file != null) {

PropertyConfigurator.configure(prefix+file);

System.out.println("Init Log4j success!");

}

public void doGet(HttpServletRequest req, HttpServletResponse res) {

}

c.create a log4j.property file that define the log4j properties

the property file is setting in web.xml

a sample property file as following

log4j.rootLogger=INFO, A1 ,R

log4j.appender.A1=org.apache.log4j.ConsoleAppender

log4j.appender.A1.layout=org.apache.log4j.PatternLayout

log4j.appender.A1.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss} [%c]-[%p] %m%n

log4j.appender.R=org.apache.log4j.RollingFileAppender

log4j.appender.R.File=../logs/log4j.log

log4j.appender.R.MaxFileSize=100KB

log4j.appender.R.MaxBackupIndex=1

log4j.appender.R.layout=org.apache.log4j.TTCCLayout

d.a test Jsp page

testLog.jsp:

<%@ page import="org.apache.log4j.*"%>

<html>

<body>

//log4j.appender.appenderName = WEB-INF/classes/log4j.log

Logger logger = Logger.getLogger("com.legendinfo");

logger.setLevel(Level.INFO);

Logger barlogger = Logger.getLogger("com.legendinfo.log");

logger.warn("Low fuel level.");

logger.debug("Starting search for nearest gas station.");

barlogger.info("Located nearest gas station.");

barlogger.debug("Exiting gas station search");

</body>

</html>

結合AbcBankB2B項目具體

posted on 2014-01-08 16:20 youngturk 閱讀(307) 評論(0) 編輯收藏所屬分類: Log4j

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